Weil-McLain NX ユーザーズマニュアル

WM  550-141-996/1105

 

  

RWB 6104WMNX R1005

Chimney Vent Systems:  Install the burner cover 
and repeat Steps 2 and 4 above. If CO2 increas-

es (O2 decreases), remove the cover and adjust 

the air setting so the CO2 (O2) with the cover 

installed meets the requirements of Step 3.

Direct Vent Systems with Outside Air Ducted to 
Burner:  Install the burner cover.

Start and stop the burner several times to ensure 
satisfactory operation. Test the primary control 
and all other appliance safety controls to verify 
that they function according to the manufactur-
er’s specifi cations.

Install the cover mounting screws in the cover 
mounting plate. 

Install the cover over the mounting plate while 
aligning the side slots with the installed cover 
mounting screws.

Direct Vent specifi ed burners include an opening 
on the top of the cover for an outside air intake.

4.

5.

6.

1.

2.

3.

SK9804A

Start the Burner

Do not attempt to start the burner when excess fuel or
vapor has accumulated in the appliance. Starting the burner
under these conditions could result in a puffback of hot
combustion gases, high smoke levels, or otherwise
hazardous operation.  

.

S112

!

 Adjust the head/air until a trace of smoke 

is achieved.  This can be accomplished by turn-
ing the screw on the head/air adjustment plate 
assembly to increase air (CCW) or decrease air 
(CW).

 

At the trace of smoke level, measure the 

CO2 (or O2) . This is the vital reference point 

for further adjustments.  Example: 13.5% CO2 

(2.6% O2)

 

 Increase the air to reduce the CO2 by 1.5 

to 2 percentage points. (O2 will be increased by 

approximately 2.0 to 2.7 percentage points.)   Ex-
ample: Reduce CO2 from 13.5% to 11.5% (2.6% 

to 5.3% O2).  

 

 Recheck smoke level. It should be Zero.

 

This procedure provides a margin of 

 

reserve air to accommodate variable 

 conditions.
 If the draft level has changed, recheck the
 

smoke and CO2 levels and readjust 

 burner, if necessary. 

 

 Once the combustion has been set, tight-

en the lower acorn nut and splined nut on the air 
adjustment assembly. See Figure 5.

•

•

 Allow the burner to run for approximately 5 to 10 
minutes.

 

Set the stack draft between -0.01” to 

 

 -0.02” w.c. for chimney vent applications. No 
draft adjustment required for direct venting.

 Follow  these  fi ve steps to properly adjust the 
burner:

1.

2.

3.